The tones that are generated when dialing out or pressing a number on the dial pad. (DTMF)

See Dual-Tone Multi-Frequency (DTMF).

A dialing method that uses tones as opposed to dial-pulses. Today most phone lines are designed for touch-tone dialing (which is faster and more reliable). Many touch-tone lines will also accept dial pulse signaling, but this is not always the case. Touch-toneâ is a trademark of AT&T; the generic name is DTMF.